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Topic: Terminal Node Controller

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	Kantronics Product Overview
		The Kantronics Talon UDC (Universal Data Controller) Data Radio combines the functionality of a radio modem/TNC with a built-in VHF/UHF radio transceiver.
		With the GPS option, the Talon is an ideal choice for real-time tracking, monitoring, and controlling of assets such as vehicles.
		Additionally, the TNC (Terminal Node Controller) capabilities in Kantronics radio modems enable you to "plug into" radio networks.
	www.kantronics.com /products.html (611 words)

	Terminal node controller - Wikipedia, the free encyclopedia
		A terminal node controller (TNC) is a device used by amateur radio operators to participate in AX.25 packet radio networks.
		TNCs were uniquely necessary when home computers lacked the sophistication needed to simultaneously manage a network connection and communicate with the user.
		Despite this, many TNCs are still in use, especially in unattended stations where reliability is important.
	en.wikipedia.org /wiki/Terminal_node_controller (438 words)

	Stand alone multiple unit tracking system - Patent 5243530
		Terminal node controller 32, in turn, controls the transmission of this positional data by a VHF radio transceiver 34 to the base station 20 by keying transceiver 34 whenever transceiver 34 needs to send data.
		Terminal node controllers 32 and 38 use a mode of operation identified as KISS which is embedded in the firmware of the terminal node controller to allow communication respectively with computers 28 and 40.
		3 terminal node controllers 32 and 38 also provide a sixteen bit frame-check sequence field 64 which insures that the frame is not corrupted by the medium used to transmit the frame from the sender to the receiver.
	www.freepatentsonline.com /5243530.html (13281 words)

	The KD2BD 9600 Baud Modem
		When terminal node controllers made their appearance on the commercial market, they included internal Bell-202 AFSK modems for communications at 1200 bit per second as standard equipment.
		Users of TNCs by other manufacturers should consult technical literature pertaining to their specific TNC to determine the proper modem disconnect header connections that need to be made between the TNC and an external modem such as the one described here.
		The AFC Adjust control, R8, may be properly set by tuning to an unmodulated carrier, and adjusting the control until the voltages on pins 12 and 13 of U4D are equal, or the voltage on pin 14 just toggles between a voltage close to +Vcc and a voltage close to ground.
	www.amsat.org /amsat/articles/kd2bd/9k6modem (6872 words)

	[No title]
		The TNC is the Terminal Node Controller, the little fl box that's wired between the computer and the radio.
		Your TNC will allow you to enter up to eight digipeaters in your connect sequence, but using more than 3 usually means long waits, lots of repeated packets, and frequent disconnects, due to noise and other signals encountered on the frequency.
		Remember, each digipeater and node adds a hop, so multiply those percentages by the number of hops, then multiply by 2 to account for the acknowledgement, and you can see how quickly the path deteriorates as traffic increases and digipeaters and nodes are added to it.
	www.textfiles.com /hamradio/packet.txt (13351 words)

	Introduction to Packet Radio
		The telephone modem is replaced by a "magic" box called a terminal node controller (TNC); the telephone is replaced by an amateur radio transceiver, and the phone system is replaced by the "free" amateur radio waves.
		The current TNC standard grew from a discussion in October of 1981 at a meeting of the Tucson Chapter of the IEEE Computer Society.
		A TNC assembles a packet from data received from the computer, computes an error check (CRC) for the packet, modulates it into audio frequencies, and puts out appropriate signals to transmit the packet over the connected radio.
	www.tapr.org /pr_intro.html (2366 words)

	Automatic Position Reporting System - How it Works
		Terminal Node Controller is an amateur radio term for the piece of hardware that connects a transceiver to a GPS receiver in order to co
		The TNC determines the path and when the channel is clear and the transmit timer expired it appends the path data and the amateur radio users callsign to the front of the coordinate packet.
		The sequence of nodes is to remove a digit each time a packet passes through them, while performing dupe check to make sure they have not already relayed the packet.
	www.msu.edu /~wolthui3/aprs/works.html (1816 words)

	The KD2BD Pacsat Modem
		Deriving the control voltage from the filtered BPSK carrier results in an AGC that is virtually immune to noise and interference that could otherwise affect the AGC and lead to demodulator desense.
		Configure the TNC for a radio data rate of 1200 baud, and connect the TX Clock and ground from the TNC to the modem and apply power to both the modem and the TNC.
		The TNC produces a series of AX.25 "flags" in its unconnected state that is sufficient for testing the clock extraction and regeneration circuitry of the modem.
	www.amsat.org /amsat/articles/kd2bd/Pacsat_Modem (4883 words)

	[No title]
		Introduction TNC-X is a new Terminal Node Controller design based on the Chepponis/Karn KISS protocol. It is implemented using a Microchip PIC 16F628 microcontroller, a CML MX614 Bell 202 modem chip, an 8K Ramtron FRAM, a Maxim MAX232A level converter chip, and a dual op-amp which provides active audio filtering for the modem.
		There are four configurable jumpers on the board: two control the terminal speed and two are used to engage and disengage the USB port.
		It could be going on while the TNC is in the middle of receiving data off the air, while the TNC is looking for a valid data stream or even while the TNC is in the middle of a data transmission.
	www.tnc-x.com /dcc3.doc (4942 words)

	Packet Radio Primer
		A packet radio station consists of a 2 meter radio, a terminal node controller (TNC), basically a modem for your radio, a computer running some type of communications software be it written for packet or as simple as a old telephone modem program like Telex, and connecting cables.
		A node is a TNC and radio on a hill top running what is called netrom.
		Now we connect to the node then connect to another station even if it is several nodes (hops) away.
	www.vhfclub.org /packet_radio_primer.htm (1522 words)

	TCARC - Portable Packet Station Set-up and Operation Procedures- KI6GR- John G. Budman
		The TNC is connected between the terminal and the radio transceiver.
		The TNC and terminal must be set in agreement, or no or garbled text results.
		User controlled settings or parameters also modify the TNC operation and are given to the TNC when you are in the command mode; that is not connected to and conversing with another station.
	www.tcoe.trinity.k12.ca.us /~tcarc/tcpkts1.html (3201 words)

	TNC - Terminal Node Controller, Threaded Neill Concelman
		TNC - Terminal Node Controller, Threaded Neill Concelman
		TNC is a acronym that can contains many meanings which are listed below.
		Terminal Node Controller is not the only word formed from TNC.
	www.auditmypc.com /acronym/TNC.asp (208 words)

	[No title]
		The Terminal Node Controller or TNC contains a modem similar to the modem used to connect your computer to the Internet, except that it also contains special firmware especially designed for Packet Radio.
		A: Check to be sure the terminal program is addressing the same comport (serial port) to which the TNC is connected.
		The most likely problem is that the terminal program baud rate (the speed at which your terminal program talks to the TNC) is not the same as that for which the TNC is set.
	www.varecs.us /volcooh.doc (1631 words)

	Introduction to Packet Radio - Part 3
		Now let's take a look at some of the commands that are available in your TNC or packet software to help improve your station operation.
		The TNC (Terminal Node Controller) has more than 100 different commands available for you to use.
		Not all TNCs are exactly alike, but all have pretty much the same set of commands.
	www.choisser.com /packet/part03.html (1113 words)

	Getting Started in Packet Radio
		In the broadest terms, it consists of a viewing device, which may be a terminal or a monitor, a "translating device" also known as a TNC or minimally as a modem, and a radio system which would also include a matching antenna.
		But, remember, the terminal is not too smart, so it needs an operating system and that is what is built-in to the TNC, hence the words node and controller.
		A TNC, or an FSK Thru-modem, or a Soundcard
	ka1fsb.home.att.net /getstart.html (1528 words)

	Packet Radio Under Linux
		A typical packet radio station consists of a computer or terminal connected to a Terminal Node controller (TNC), and radio transceiver (transmitter/receiver).
		A TNC is a device containing a small microprocessor, dedicated firmware in ROM, and a modem to convert signals back and forth between audio and serial bit formats, and also encodes and decodes data with the AX.25 protocol.
		A signal from a serial or parallel port in conjunction with a simple (one transistor) circuit is used to control the radio's PTT (Press To Talk) circuit.
	www.linuxjournal.com /node/2218/print (1379 words)

	Using a Rabbit Isn't Rocket Science Or is it?
		At the same time, the Rabbit was also serially interfacing to a terminal node controller and a GPS unit on 2 serial ports.
		It was great because on a long rocket you have sensors in the nose cone and the body, and it was nice to interface with these sensors with 2 wires instead of a string of wires.
		We used 2 of the 4 serial ports on the Rabbit to interface to a terminal node controller, which interfaced to a HAM radio.
	www.rabbitsemiconductor.com /press/SuccessStories/asa/index.shtml (1159 words)

	Downloadable Software
		The WB5IPM Rotor Controller was described in the May 1987 issue of QEX, published by the ARRL.
		The rotor controller is connected to a parallel port (circuit diagram included), or via a GS-232 or RC-2800 serial interface.
		Antenna and radio control for the Kansas City Tracker, as a 32-bit DLL for use with 32-bit applications under Windows 95.
	www.amsat.org /amsat/ftpsoft.html (6064 words)

	TNC - Terminal Node Controller
		The TNC is typically connected to a host computer or terminal with an RS-232 DCE (Data Communications Equipment) connector.
		A TNC handles all necessary channel protocols, and since they are often difficult to implement on personal computers which do not provide real-time multitasking operating systems, this approach allows the use of packet radio in a much wider variety of applications.
		A TNC is generally used to implement the chosen media access protocols (explained in previous section) in an amateur packet radio network.
	minnie.tuhs.org /Seminars/Dual/subsection3_4_4.html (172 words)

	Packet
		There are a variety of Terminal Node Controllers (TNCs) on the market today.
		The computer does not have to be the newest, fastest machine on the market, but it does need to be able to run the software package that you will use with your TNC program.
		Most of the computers in use at packet stations are older model 486 DX 66 machines with a minimum amount of memory (16 Meg) and a hard drive large enough to hold the software package, operating system and stored messages.
	www.emcomm.org /svares/packet (445 words)

	Configuring SpotCollector's Terminal Node Controller Settings
		The Packet TNC tab lets you specify and configure the serial port by which your TNC is connected:
		Each command file present in this folder is presented as a choice in the TNC model listbox.
		To facilitate the inclusion of control characters, the sequence
	www.dxlabsuite.com /spotcollector/Help/ConfigurationPacket.htm (200 words)

	[No title]
		Varying program features, along with different terminal node controller hardware, may be integrated in the future.
		When a configuration is loaded, the program fields and user interface controls are populated with the data as it was when the configuration was saved.
		The connection with the TNC is disconnected gracefully.
	www.cs.ttu.edu /~telemetr/detail_4.doc (2746 words)

	[No title]
		Any packet TNC can be used a packet relay station, or a digipeater.
		This connect then connect again means that to a user's TNC, you are connected to a local station only and it's transmissions does not have to be digipeated over the entire network and risk loosing packets.
		This is good because as new nodes come on-line, they are automatically integrated in the network, but if band conditions such as ducting occur, often unreachable nodes are entered into node lists.
	www.hackcanada.com /blackcrawl/hamradio/datacom/packtfaq.txt (2341 words)

	[No title]
		Under Tnc Setup you will Select Port the com port to be used for controlling the transmit function of your transceiver should be selected and under Tnc Type select Sound Card.
		Under TNC Commands, you may need to adjust the TXDelay for your particular radio if the initial packet transmission occurs too quickly for the radio to enter transmit mode.
		The terminal program can be placed in the “Startup Programs” list of AGWPE so the terminal program automatically executes when AGWPE is started.
	gaares.org /templates/ARES_TS_2-1.doc (1172 words)

	TIMEWAVE PK-96 9600/1200bps TNC Radio Modem (Site not responding. Last check: 2007-10-31)
		This is very handy when the TNC is installed in a vehicle-you don't need to take the unit out to change commands.
		A radio control head button can be configured to send GPS information with the touch of a finger.
		This is where you connect the TNC and the GPS receiver to separate serial ports on your home computer.
	www.timewave.com /pk96.html (969 words)

	Troubled Times: TNC (Site not responding. Last check: 2007-10-31)
		It is linked to the possession on a device called a TNC (terminal node controller), which is a relatively inexpensive addition to the radio itself which connects the PC to the radio.
		One can even use a dumb terminal connected to the TNC to communicate digitally.
		What is relevant to the operating system is software that makes it easy to utilize the TNC and format/store the digital communication.
	www.zetatalk.com /info/tinfo14w.htm (203 words)

	SHANDX EI7SDX DX PacketCluster Node (Site not responding. Last check: 2007-10-31)
		During January 2003 the frequency of the 2 metre port was changed to 144.875 MHz and the two nodes were combined under the call EI3IO-4.
		And if you don’t want to transmit packet or you’re a SWL, there are TNC terminal programs that will work in conjunction with a monitor receiver.
		All that is needed in addition to a radio and a computer is a Controller (Terminal Node Controller or TNC), which generates and decodes the AX25 1200 Baud amateur packet transmissions.
	www.connogue.com /ei3io/shandx.htm (609 words)

	Management of TNCs by means of the Simple Network Management Protocol (ResearchIndex) (Site not responding. Last check: 2007-10-31)
		If your firewall is blocking outgoing connections to port 3125, you can use these links to download local copies.
		TNCs are widely used in the amateur packet radio community.
		A Management Information Base (MIB) has been created for the TNCs parameters we manage in KISS mode.
	citeseer.ist.psu.edu /207978.html (338 words)

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